來自拉丁語 spontaneus,自由意誌的，自發的，來自短語 sua sponte,自我意誌，自願，來自 sua,
英文詞源
spontaneous (adj.)
1650s, "occurring without external stimulus," from Late Latin spontaneus "willing, of one's free will," from Latin (sua) sponte "of one's own accord, willingly;" of uncertain origin. Related: Spontaneously; spontaneousness. Used earlier of persons and characters, with a sense "acting of one's own accord" (c. 1200). Spontaneous combustion first attested 1795. Spontaneous generation (the phrase, not the feat) attested from 1650s.
雙語例句
1. I had another spontaneous miscarriage at around the 16th to 18th week.
我在大約第16至18孕周時又經曆了一次自然流產。
來自柯林斯例句
2. spontaneous outpourings of praise
一片自然迸發的讚美聲
來自《權威詞典》
3. a spontaneous offer of help
主動提出幫助
來自《權威詞典》
4. Spontaneous applause broke out as soon as she finished speaking.